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RARE two-point Dixo...
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Rydén, HenricKarolinska Institutet
(författare)
RARE two-point Dixon with dual bandwidths.
- Artikel/kapitelEngelska2020
Förlag, utgivningsår, omfång ...
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2020-04-25
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Wiley,2020
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printrdacarrier
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LIBRIS-ID:oai:DiVA.org:uu-463982
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-463982URI
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https://doi.org/10.1002/mrm.28293DOI
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http://kipublications.ki.se/Default.aspx?queryparsed=id:143514364URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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PURPOSE: To investigate the impact of dual readout bandwidths (dBW) in a dual echo fat/water acquisition and describe a dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence where the concept is used to improve SNR by removing dead times between refocusing pulses and avoiding redundant Chemical-shift encoded.METHODS: Cramér-Rao bounds and Monte Carlo simulations were used to investigate a two-point fat/water model where the difference in bandwidths is incorporated. In vivo images were acquired at 1.5 and 3 T with the dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence. Typical bandwidth ratios were 1:2. SNR was compared with a single bandwidth sequence under identical scan parameters at 3T.RESULTS: Monte Carlo simulations and Cramér-Rao analysis demonstrate that number of signal averages can be improved with dual bandwidths compared to conventional single bandwidth acquisitions. The dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence can acquire images with high readout resolutions with well-conditioned sampling. An SNR improvement of 52% was measured, in line with the theoretical gain of 54%.CONCLUSIONS: The proposed dBW-rapid acquisition relaxation enhanced, or turbo spin echo sequence is a highly SNR-efficient two-point rapid acquisition relaxation enhanced, or turbo spin echo sequence without dead times, and can acquire images at higher resolutions than current vendor-supplied alternatives.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Berglund, JohanKarolinska Institutet(Swepub:uu)johbe573
(författare)
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Norbeck, OlaKarolinska Institutet
(författare)
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Avventi, Enrico
(författare)
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Sprenger, Tim
(författare)
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van Niekerk, AdamKarolinska Institutet
(författare)
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Skare, StefanKarolinska Institutet
(författare)
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Karolinska Institutet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Magnetic Resonance in Medicine: Wiley84:5, s. 2456-24680740-31941522-2594
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